I'm not overly concerned about repetition, probably because I'm just not concerned about repetition.
You thought it was a book, but no. Because I live every second of my life as closely to the Ninja code as I can, I am always looking for opportunities to conceal covert devices.
Admittedly I have no covert devices and have had to settle for the "projects in a matchbox" from Day 4 and Day 18. The other two matchboxes have been cleverly filled with matches and can be used to make fire (which, when you think of it, is pretty amazing)
The Neodymium magnet to close the box is a throwback from the old backgammon board days. That's old skool in my book (did you see what I did there?).
Did I even mention how unconcerned I am about repetition?